Learning objective

Define rate of reaction as the speed at which reactants are used up or products are formed.

Read the explanation, check the common trap, then practise with flashcards and questions.

Start flashcards Try practice questions Topic hub

At a glance

Flashcards

Questions

Topic

Rate of reaction

Subtopic

Calculating rates of reactions

AQA GCSE ChemistryThe rate and extent of chemical change

Study support

Understand this objective

Short explanation

In Calculating rates of reactions, this learning objective focuses on how to define rate of reaction as the speed at which reactants are used up or products are formed. Within Rate of reaction, students should keep the idea anchored to Calculating rates of reactions rather than drifting into a different rate, equilibrium, catalyst, reversible reaction, or graph concept. Key terms to use include rate of reaction. A strong AQA GCSE Chemistry answer names the exact factor or relationship, explains the particle or equilibrium reason where needed, and links the point back to the question wording with correct units or graph language when relevant.

Key concepts

rate of reactionmean rate

Why it matters

This objective helps connect Calculating rates of reactions to exam-style questions, flashcards, and revision notes for Rate of reaction.

Common mistakes

1 linked

Misidentifying the rate unit: Always pair the rate with the appropriate unit that matches the measured quantity: if you are using mass, use g s⁻¹; if volume, use cm³ s⁻¹; if moles, use mol s⁻¹. Write the unit as a fraction (e.g., g s⁻¹) rather than a product (g s).

Revision tools